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Chapter 35 Plant Structure and Growth

Chapter 35 Plant Structure and Growth - Chapter 35 Plant...

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Chapter 35 Plant Structure and Growth (pages 712 – 728) The Plant Body Three basic organs: 1. Roots (root system) 0. Fibrous root: mat of thin roots that spread out below soil surface 1. Monocots 2. Anchors and increases exposure to water 3. Taproot: one large, vertical root Dicots firmly anchor plant and often store food (ex. Carrots) Root hairs: increase surface area of root enormously Adventitious roots: roots growing in an atypical location (ex. Corn roots act as props) 2. Stems (shoot system) 4. Nodes: sites where leaves and buds attach 5. Internodes: stem segments between nodes 6. Axillary bud: dormant, vegetative potential 7. Terminal bud: apex of young shoot 8. Apical dominance: inhibits axillary buds so that plant concentrates on growing taller towards light See figure 35.5 for modified stems 3. Leaves (shoot system) 1. Blade: flattened surface 2. Petiole: attaches blade to node of the stem 3. See figure 35.7 for modified leaves Simple vs. compound leaves Monocot vs. dicot leaves Three Tissue Systems (see figure 35.8)
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